Trade-off between angular and spatial resolutions in in vivo fiber tractography

NeuroImage
Sjoerd B VosRoland Bammer

Abstract

Tractography is becoming an increasingly popular method to reconstruct white matter connections in vivo. The diffusion MRI data that tractography is based on requires a high angular resolution to resolve crossing fibers whereas high spatial resolution is required to distinguish kissing from crossing fibers. However, scan time increases with increasing spatial and angular resolutions, which can become infeasible in clinical settings. Here we investigated the trade-off between spatial and angular resolutions to determine which of these factors is most worth investing scan time in. We created a unique diffusion MRI dataset with 1.0 mm isotropic resolution and a high angular resolution (100 directions) using an advanced 3D diffusion-weighted multi-slab EPI acquisition. This dataset was reconstructed to create subsets of lower angular (75, 50, and 25 directions) and lower spatial (1.5, 2.0, and 2.5 mm) resolution. Using all subsets, we investigated the effects of angular and spatial resolutions in three fiber bundles-the corticospinal tract, arcuate fasciculus and corpus callosum-by analyzing the volumetric bundle overlap and anatomical correspondence between tracts. Our results indicate that the subsets of 25 and 50 directions prov...Continue Reading

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Citations

Jun 28, 2017·NMR in Biomedicine·Stamatios N Sotiropoulos, Andrew Zalesky
Oct 18, 2018·The Journal of Comparative Neurology·G Allan JohnsonLeonard E White
Mar 13, 2019·Scientific Reports·Chiara MaffeiJorge Jovicich
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Jul 16, 2021·Frontiers in Human Neuroscience·Ann AlvarGeorgia A Malandraki
Jun 23, 2021·Physics in Medicine and Biology·Joseph Yuan-Mou YangFernando Calamante
Jul 20, 2021·Computers in Biology and Medicine·Oeslle LucenaSebastien Ourselin
Jul 2, 2021·Journal of Neuro-oncology·Natalie L VoetsPuneet Plaha

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